Effect of inter-molecular collision on isotope separation by infrared multiphoton dissociation

分子间碰撞对红外多光子解离同位素分离的影响

• 批准号: 20360422
• 负责人: YOKOYAMA Atsushi
• 金额: $ 7.57万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360422/
• 关键词: 赤外多光子解離; 同位体分離; 分子間衝突; 振動分布; 同立体分離

We constructed an apparatus for Raman spectrum measurement and measured time-dependent Raman spectra of C_5H_8O irradiated by a CO_2 laser. The average vibrational energy of C_5H_8O estimated from the Raman spectra agrees with one simulated by using a rate-equation model including processes of photo-absorption, induced emission, vibrational excitation and de-excitation induced by a collision, and uni-molecular dissociation. This indicates the validity of the simulation. We also elucidated the mechanism for the increase of isotopic separation factor with increasing gas pressure by using this simulation technique.

我们建立了一套拉曼光谱测量装置，测量了C_5H_8O在CO_2激光辐照下的含时拉曼光谱。由拉曼谱估算的C_5H_8O的平均振动能与用速率方程模型模拟的C_5H_8O的平均振动能一致，该模型包括光吸收、诱导发射、碰撞引起的振动激发和去激发以及单分子解离过程。这表明了模拟的有效性。我们还阐明了同位素分离因子随气压增加而增加的机理。

项目成果

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Quantum control study of ultrafast isotope-selective vibrational excitations of the cesium iodide (CsI) molecule

碘化铯 (CsI) 分子超快同位素选择性振动激发的量子控制研究

• 发表时间: 2011
• 期刊: Comput.Theo.Chem.
• 作者: Y.Kurosaki;K.Yokoyama;A.Yokoyama
• 通讯作者: A.Yokoyama

Isotopically Selective Infrared Multiphoton Dissociation of 2,3-Dihydropyran

2,3-二氢吡喃的同位素选择性红外多光子解离

• 发表时间: 2008
• 期刊: Journal of Physical Chemistry A 112
• 作者: A. Yokoyama;K. Katsumata;H. Ohba;H. Akagi;M. Saeki;and K. Yokoyama
• 通讯作者: and K. Yokoyama

Vibration-Selective Coherent Anti-Stokes Raman Scattering with Linearly Chirped White-Light Pulses

具有线性啁啾白光脉冲的振动选择性相干反斯托克斯拉曼散射

• 发表时间: 2010
• 期刊: Chem.Phys.Lett.
• 作者: T.Kasajima;K.Yokoyama;L.Matsuoka;A.Yokoyama
• 通讯作者: A.Yokoyama

Practical Method for Producing a Large Amount of Isotopically Enriched Silicon by Infrared Multi-Photon Dissociation of Hexafluorodisilane

六氟乙硅烷红外多光子解离大量生产同位素富集硅的实用方法

• 发表时间: 2008
• 期刊: Japanese Journal of Applied Physics 47
• 作者: Hironori Ohba;Hiroshi Akagi;Keiichi Katsumata;Masashi Hashimoto;and Atsushi Yokoyama
• 通讯作者: and Atsushi Yokoyama